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The abundance of raw materials is a significant advantage that positions sodium-ion batteries (SIBs) as a promising energy storage solution for the future. However, the low cycle efficiency and poor rate capacity of cathode materials have hindered the commercialization of SIBs, prompting extensive research efforts to address these challenges. Ion doping into the material structure is considered to be an effective, simple, and scalable approach to enhancing the electrical performance of cathode materials. In this work, B and F elemental ions were selectively doped into the structure of sodium-lithium-manganese-cobalt oxide material via the sol-gel method combined with calcination. The effects of B and F ion doping on the properties of the obtained materials exhibited distinct variations, particularly in the electrochemical performance. While the B-doped material (B-NLMC) exhibited a specific capacity of up to 166.5 mAh g -1 at a current density of 10 mA g -1 and maintained 72.1% capacity after 100 cycles, the material simultaneously doped with B and F ions (BF-NLMC) demonstrated lower specific capacity and cycling efficiency compared to B-NLMC. However, the BF-NLMC material exhibited significantly improved rate capability, delivering a specific capacity of up to approximately 80 mAh g -1 at a high current density of 200 mA g -1 . Obviously, this research offers valuable insights into diversifying doping strategies to enhance the electrochemical performance of cathode materials, contributing to the advancement of SIB technology., Competing Interests: The authors declare no competing financial interest., (© 2024 The Authors. Published by American Chemical Society.)

From the moss Erythrodontium julaceum Paris growing in Vietnam, julacelide (1), a new 3-benzylphthalide, along with methyl orsellinate (2), ethyl orsellinate (3), 4-O-methylhaematommic acid (4), and zeorin (5), were isolated and structurally elucidated. Their chemical structures were elucidated through extensive 1D and 2D NMR analysis and high-resolution mass spectroscopy as well as through comparisons to the existing literature. Compound 4-O-methylhaematommic acid was a new natural product. The absolute configuration of julacelide was defined using time-dependent density functional theory (TDDFT) calculations. Julacelide was evaluated for α-glucosidase inhibition., (© 2023 Wiley-VHCA AG, Zurich, Switzerland.)

A new species, Callicarpa bachmaensis Soejima & Tagane, sp. nov., is described and illustrated from Bach Ma National Park in Thua Thien Hue Province, Central Vietnam. This species has a characteristic liana habit, white corolla, and narrowly elliptic to narrowly lanceolate, entire, occasionally subequal leaves, by which it is clearly distinguished from the other previously known species of this genus.